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    <title>Document</title>
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    <script>

        // 1.自增计算
        // 问题：通过注释写出每一步正确的计算过程和计算结果
        let a = 10
        a++     
        console.log(a)   //11
        let b = 10
        ++b
        console.log(b)   //11
    </script>
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